From f910ac85cb024f6d523e2c9dab0518f227a0bfb9 Mon Sep 17 00:00:00 2001
From: Aneurin Barker Snook <a@aneur.in>
Date: Tue, 10 Oct 2023 22:06:23 +0100
Subject: [PATCH] add simple random package

---
 go.mod    |  3 +++
 random.go | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 go.mod
 create mode 100644 random.go

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..3d4e852
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/recipeer/go/random
+
+go 1.21.2
diff --git a/random.go b/random.go
new file mode 100644
index 0000000..6880f40
--- /dev/null
+++ b/random.go
@@ -0,0 +1,18 @@
+package random
+
+import "math/rand"
+
+// Str generates a random string of the specified length using an alphanumeric character set.
+var Str = String([]rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"))
+
+// String returns a function that can be used to generate a random string of the specified length using the given character set.
+func String(chars []rune) func(length int) string {
+	max := len(chars)
+	return func(length int) string {
+		s := make([]rune, length)
+		for i := range s {
+			s[i] = chars[rand.Intn(max)]
+		}
+		return string(s)
+	}
+}